Flora of North America species comparison

bark exfoliating in shreds;

nodal diaphragms 1–2.5 mm thick;

branchlets gray to green or brown, if purplish only on one side, terete, glabrous, growing tips not enveloped by unfolding leaves, glabrous or sparsely hairy;

tendrils along length of branchlets, persistent, branched, tendrils (or inflorescences) at only 2 consecutive nodes;

nodes not red-banded.

bark exfoliating in shreds;

nodal diaphragms 2.5–6 mm thick, sometimes continuing halfway into internode;

branchlets subterete to terete, densely to sparsely tomentose, growing tips not enveloped by unfolding leaves;

tendrils along length of branchlets, persistent, branched, tendrils (or inflorescences) at only 2 consecutive nodes;

nodes not red-banded.

stipules 1.5–3 mm;

petiole ± equaling blade;

blade cordate, (5–)9–18 cm, usually unlobed or shallowly 3-lobed, sometimes deeply lobed on ground shoots, apex acute to short acuminate, abaxial surface not glaucous, glabrous, visible, veins and vein axils sometimes hirtellous, adaxial surface usually glabrous, sometimes sparsely hirtellous.

stipules less than 1 mm;

petiole 1/2–3/4 blade;

blade broadly cordate to nearly reniform, 4–12 cm, usually unlobed, sometimes 3-shouldered, infrequently deeply 3–5 lobed, apex acute to obtuse, abaxial surface not glaucous, densely white to rusty tomentose, concealed (except sometimes veins) by hairs, adaxial surface floccose to glabrate.

9–19 cm.

4–10 cm.

functionally unisexual.

functionally unisexual.

black, usually not, sometimes very slightly, glaucous, globose, 8–12 mm diam., skin separating from pulp;

lenticels absent.

dark red to purple-black, slightly or not glaucous, globose, 12+ mm diam., skin separating from pulp;

lenticels absent.

= 38.

= 38.